/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.phoenix.repository.query.qom2;

import javax.jcr.query.qom.DescendantNodeJoinCondition;

/**
 * <code>DescendantNodeJoinConditionImpl</code>...
 */
public class DescendantNodeJoinConditionImpl extends JoinConditionImpl implements DescendantNodeJoinCondition {

	/**
	 * Name of the descendant selector.
	 */
	private final String descendantSelectorName;

	/**
	 * Name of the ancestor selector.
	 */
	private final String ancestorSelectorName;

	DescendantNodeJoinConditionImpl(NamePathResolver resolver, String descendantSelectorName, String ancestorSelectorName) {
		super(resolver);
		this.descendantSelectorName = descendantSelectorName;
		this.ancestorSelectorName = ancestorSelectorName;
	}

	/**
	 * Gets the name of the descendant selector.
	 * 
	 * @return the selector name; non-null
	 */
	public String getDescendantSelectorName() {
		return (descendantSelectorName);
	}

	/**
	 * Gets the name of the ancestor selector.
	 * 
	 * @return the selector name; non-null
	 */
	public String getAncestorSelectorName() {
		return (ancestorSelectorName);
	}

	// ------------------------< AbstractQOMNode >-------------------------------

	/**
	 * Accepts a <code>visitor</code> and calls the appropriate visit method
	 * depending on the type of this QOM node.
	 * 
	 * @param visitor
	 *            the visitor.
	 */
	public Object accept(QOMTreeVisitor visitor, Object data) throws Exception {
		return visitor.visit(this, data);
	}

	// ------------------------< Object >----------------------------------------

	public String toString() {
		String descendant = getDescendantSelectorName();
		String ancestor = getAncestorSelectorName();
		return "ISDESCENDANTNODE(" + descendant + ", " + ancestor + ")";
	}

}
